Multiple access satellite communications network

• US 6,690,934 B1
• Filed: 06/05/2000
• Issued: 02/10/2004
• Est. Priority Date: 10/24/1997
• Status: Expired due to Fees

• Current Assignee: SSC Space U.S., Inc. (Government of Sweden), Nancy E. Conrad
• Original Assignee: SSC Space U.S., Inc. (Government of Sweden)
• Inventors: Massey, David Earl, Conrad, Charles Jr., Ingersoll, Thomas Ray, Glim, Carl Joseph
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): Afshar, Kamran
• Application Number:
  US09/529,987
• Time in Patent Office: 1,345 Days
• Field of Search: 455/12.1, 455/13.1, 455/427, 455/428, 455/430, 455/426, 455/302, 370/340, 370/316, 370/321, 370/250, 709/222, 342/357.15, 342/357.09, 342/357.08
• US Class Current: 455/427
• CPC Class Codes: H04B 7/18519 Operations control, administration or maintenance

Abstract

A shared single system of ground stations (120) for servicing any number of satellite owners, permits the owners to transfer command information to their satellite (110), and collect data streams that arm sent back from the satellite all via a standardized global communication system maintained and operated by a commercial satellite communications company. A remotely controlled ground station (120) is operated and controlled from a central controller. Each user creates and stores a ground station configuration file at the central controller, which file contains the data necessary to configure the remotely controlled ground station (120) to communicate with the user'"'"'s satellite (110). When the user desires to communicate with the user'"'"'s satellite, the user schedules a communication session with the central controller, which downloads the configuration file to the appropriate ground station. The appropriate ground station is determined based on current orbital characteristics of the satellite in question. A server at the ground station then uses the data in the configuration file to configure equipment at the ground station to communicate with the desired satellite.

Claims

1. A shared communication system for communicating between a plurality of independent satellite users and each of their respective orbiting satellites comprising:

a) a user interface, one for each of the plurality of independent satellite users, accepting user data from one of the plurality of independent satellite users to be transmitted to or accepting user instructions to receive satellite data from a selectable one of the plurality of orbiting satellites;

b) a central controller being coupled to the user interface, receiving the user data to be transmitted or receiving the user instructions to receive the satellite data from the selectable one of the plurality of orbiting satellites, interacting with the one of the plurality of independent satellite users via the user interface to enable the one of the plurality of independent satellite users to control the satellite to which the user data is to be transmitted and/or satellite data is to be received, and to schedule a time at which the user data is to be transmitted and/or satellite data is to be received; and

c) a plurality of remote ground stations, each ground station having;

(i) a remotely transmitter receiving the user data to be transmitted, transmitting the user data to the selectable one of the plurality of orbiting satellites, and

(ii) a receiver receiving the satellite data for the one of the plurality of independent satellite users from the selectable one of the plurality of satellites, and communicating the satellite data to the user interface or the central controller, wherein the central controller interacts with the one of the plurality of independent satellite users to control from which of the plurality of remote ground stations the user data is to be transmitted and/or satellite data is to be received.

2. The system according to claim 1, further comprising a communications network maintaining communications between said user interface, said central controller, and said plurality of remote ground stations via which the satellite data and the user data is transmitted to and from the plurality of independent satellite users and the plurality of remote ground stations.

3. The system according to claim 1, wherein each of the plurality of remote ground stations includes a control computer and the transmitter at each of the plurality of remote ground stations includes a control input coupled to the control computer by which the control computer configures the transmitter for transmission to one of the plurality of orbiting satellites.

4. The system according to claim 1, wherein each of the plurality of remote ground stations includes a control computer and the receiver at each of the plurality of remote ground stations includes a control input coupled to the control computer by which the control computer configures the receiver for transmission to one of the plurality of orbiting satellites.

5. The system according to claim 3, wherein the user interface includes a graphical user interface via which the user can enter configuration information for the transmitter and receiver at one of the remote ground stations from which user data is to be transmitted to or satellite data is to be received from one of the plurality of orbiting satellites.

6. The system according to claim 5, wherein the configuration information is passed to the control computer at said one of the remote ground stations, and the control computer configures the transmitter or receiver according to the configuration information.

7. The system according to claim 1, wherein the user interface comprises a graphical user interface executing on a computer, and includes a web browser enabling a user to enter user identification information.

8. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to specify a satellite access time and a particular remotely controlled ground station from which the user desires to communicate with the satellite in orbit.

9. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to specify communication format and protocol information for communicating with the satellite in orbit, which communication format and protocol information is used to configure communication equipment at one of the remotely controlled ground stations.

10. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to enter user data to communicate to the satellite in orbit or to specify satellite data to retrieve from the satellite in orbit.

11. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to view the satellite'"'"'s current orbital path.

12. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to participate in a data communication session with the satellite in orbit in real-time or to specify a store and forward operation of data retrieved from the satellite.

13. The system according to claim 7, wherein the graphical user interface includes a web page enabling a user to configure equipment in a communications path within one of the remote ground stations for use in communicating with one of the plurality of orbiting satellites.

14. The system according to claim 2, wherein said communications network comprises a public switched telephone network, which is used for low priority and small sized transmissions, and a frame relay transmission network, which is used for large packets of data being transmitted in real time.

15. A method for communicating data between a user and a satellite via a plurality of remote ground stations comprising the steps of

acquiring identification data from the user, which identification data includes an identification of the satellite with which the user wishes to communicate, and control data to be transmitted to the satellite, if any;

presenting to the user a list of available time slots and associated remote ground stations for communicating with the identified satellite based on the identification data; and

enabling a user to select an available time slot and an appropriate ground station.

16. The method according to claim 15, further comprising the steps of transferring the identification and control data to a central controller and resolving resource allocation and communication conflicts among other users and available resources to facilitate transmission of the control data to the identified satellite.

17. The method according to claim 15, further comprising the step of transferring the control data to the remote ground station and transferring the control data to the identified satellite.

18. The method according to claim 15, further comprising the step of receiving satellite data from the identified satellite and transferring the satellite data to the user.

19. The method according to claim 15, further comprising the step of requesting priority data and pricing preference information from the user and allocating resources and communication conflicts based on said priority data and pricing preference information.

20. A single command and control center for a plurality of independently launched and operated satellites, said single command and control center interacting with a plurality of users at a plurality of user sites, comprising:

a) a network management center providing command and control services for all of the plurality of independently launched and operated satellites, receiving user data to be transmitted to the plurality of independently launched and operated satellites and managing requests from the plurality of users for satellite data from the plurality of independently launched and operated satellites;

b) a user interface being disposed at each of the plurality of user sites, enabling a user to interact with the network management center to send user data to a satellite the user desires to communicate with, and to receive satellite data from a satellite the user desires to communicate with; and

c) a plurality of remote ground stations being controlled by the network management center, and transmitting user data to and receiving satellite data from each of the plurality of independently launched and operated satellites.

21. The single command and control center according to claim 20, further comprising a data network coupling the network management center, the plurality of remote ground stations and the plurality of user sites together in a wide area network.

22. The single command and control center according to claim 20, wherein the user data includes commands.

23. The single command and control center according to claim 21, wherein the commands include one selected from the group consisting of instructions to cameras on a satellite to acquire data from designated locations on earth, instructions to collect radio signals at designated frequencies, or instructions to transmit back to earth designated data that has been previously collected by a satellite.

24. The single command and control center according to claim 20, wherein the network management center includes a database storing orbital data for all of the plurality of independently launched and operated satellites.

25. The single command and control center according to claim 24, wherein the network management center determines which one of the plurality of remote ground stations is optimum to transmit particular user data to a particular satellite at a particular time based on the orbital data stored in the database.

26. The single command and control center according to claim 24, wherein the network management center determines which one of the plurality of remote ground stations is optimum to transmit particular user data to a particular satellite at a particular time based on the orbital data stored in the database and provides this determination to the user via the user interface, and the user interface enables the user to select which of the remote ground stations from which to communicate.

27. The single command and control center according to claim 24, wherein the network management center determines which one of the plurality of remote ground stations is optimum to receive particular user data from a particular satellite at a particular time based on the orbital data stored in the database.

28. The single command and control center according to claim 20, wherein the network management center transmits configuration information to a particular one of the plurality of remote ground stations selected to transmit the user data or receive the satellite data, and the configuration information includes information required to handle transmission of the user data or reception of the satellite data.

29. The single command and control center according to claim 24, wherein the network management center schedules all user requests and optimizes when and from what remote ground station each set of commands should be transmitted.

30. The single command and control center according to claim 27, wherein the network management center determines which one of the remote ground stations is optimum to receive the particular user data based on a time when the particular user data will be ready and a period of time required to retrieve the particular user data.

31. The single command and control center according to claim 20, wherein the network management center further comprises an auto-scheduler, which stores schedule information and transmits instructions to a particular remote ground station to begin preparing to communicate with a particular satellite.

32. The single command and control center according to claim 20, wherein each of the remote ground stations further comprises a processor including a pre-pass configuration build module, a construct antenna commands and frequency predicts module, and a storage including a customer configuration file, and an orbital elements file.

33. The single command and control center according to claim 32, wherein the customer configuration file includes information required to configure the remote ground station for a particular communication with a particular satellite, which information is passed to the pre-pass configuration build module.

34. The single command and control center according to claim 33, wherein the pre-pass configuration build module sends required commands to the construct antenna commands and frequency predicts module, which in combination with information from the orbital elements file initializes and configures the antenna and radio frequencies to communicate with the particular satellite.

35. The single command and control center according to claim 32, wherein the processor further comprises a pre-pass calibration test module performing a series of system checks prior to a scheduled time for the particular satellite to appear within communication range.

36. The single command and control center according to claim 31, wherein the auto-scheduler transmits a prompt to a particular user over the data transport network approximately at the same time the auto-scheduler transmits instructions to a particular remote ground station to begin preparing to communicate with the particular satellite.

37. The single command and control center according to claim 36, wherein the user interface further comprises a customer log-on interface via which the particular user logs-on to the user interface and a customer access authentification interface authenticating the particular user during a log-on attempt, and upon authentification, data received at the particular remote ground station is transmitted to the particular user via the data transport network.

38. An apparatus for enabling a user to interact with a network of remotely controlled ground stations communicating with a satellite in orbit, comprising:

a) a computer having an interface to a network to which the remotely controlled ground station is coupled; and

b) a graphical user interface executing on the computer, and including;

(i) a web browser enabling a user to enter user identification information;

(ii) a first web page enabling a user to specify a satellite access time and a particular remotely controlled ground station from which the user desires to communicate with the satellite in orbit; and

(ii) a second web page enabling a user to specify communication format and protocol information for communicating with the satellite in orbit, which communication format and protocol information is used to configure communication equipment at one of the remotely controlled ground stations.

39. The apparatus according to claim 38, wherein the graphical user interface further comprises a third web page enabling a user to enter user data to communicate to the satellite in orbit or to specify satellite data to retrieve from the satellite in orbit.

40. The apparatus according to claim 38, wherein the graphical user interface further comprises a third web page enabling a user to view the satellite'"'"'s current orbital path.

41. The apparatus according to claim 38, wherein the graphical user interface further comprises a third web page enabling a user to participate in a data communication session with the satellite in orbit in real-time or to specify a store and forward operation of data retrieved from the satellite.